"This will be a chance for her to see the America that he grew up in," a source told The Sun.

Cheryl's romance with Tre, who is joining her on tour, is getting "serious", according to the source.

The insider added: "Cheryl and Tre have been seeing each other for less than a year but they are already very serious about each other. They have been spending a lot of time together recently. He is working on her UK tour and has been at all of the rehearsals."

The couple met after Cheryl's performance at the 2010 live finals of US show Dancing With The Stars, but only began dating earlier this year.